tree 11327a852c0ee8d001cb4bfe19dc0d2a12e07664
parent 1bdff417bf370e0b4401b72426bbbbc94a9c7fe5
author Barret Rhoden <brho@cs.berkeley.edu> 1583531614 -0500
committer Barret Rhoden <brho@cs.berkeley.edu> 1585780074 -0400

iommu: overhaul initialization code

All of the setup code was hard to follow, to include initialization,
enabling translation, etc.  It was also unclear about what was
necessary, such as when we needed to do write-buffer flushing or
read/write draining.

Yeah, this is a bit of mult-commit.  Undoing damage...

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>